Antimicrobial composition

Abstract

An antimicrobial composition with a synergistic combination of ingredients is described. Cosmetic compositions containing the antimicrobial composition with improved preservation properties are also described. The cosmetic compositions are effective in treating the skin to cleanse, moisturize and to reduce the effects of aging and photo damage and treat other skin conditions after being topically applied.

What is claimed is: 
     
       1. A cosmetic composition comprising:
 an antimicrobial composition and a cosmetically acceptable base, wherein the antimicrobial composition comprises: 
 a. phenoxyethanol in a concentration of 0.2 to 1.0 wt. %; 
 b. caprohydroxamic acid in a concentration of about 0.1 to 1.2 wt. %; 
 c. a hydroxyacetophenone selected from the group consisting of 4-hydroxy-acetophenone, 3-hydroxyacetophenone, 2-hydroxyacetophenone and combinations thereof in a concentration of about 0.1% to 1.0 wt. %; and 
 d. cycloalkyl compounds 
 
       
         
           
           
               
               
           
         
       
       in a total concentration of about 0.5 to 1.0 wt. %. 
     
     
       2. The cosmetic composition of  claim 1 , wherein the antimicrobial composition is present in an amount effective to at least inhibit 99% of at least one viable microorganism from re-growth using the modified challenge test at day 21 and further wherein the microrganism is selected from  B.cepacia, P.aeruginosa, P.putida, S.aureus, C.albicans  and  A.brasiliensis  or any combination thereof. 
     
     
       3. The cosmetic composition of  claim 1  further comprising isothiazolinone antimicrobial compounds; wherein total isothiazolinone antimicrobial compounds are present at a maximum level of 0.15 wt. % as a total amount based on the weight of the cosmetic composition. 
     
     
       4. The cosmetic composition according to  claim 1 , wherein the composition is a medicament. 
     
     
       5. The cosmetic composition according to  claim 4  wherein the composition is an antimicrobial composition. 
     
     
       6. The cosmetic composition of  claim 1 , wherein the antimicrobial composition is present in an amount effective to at least inhibit 99% of viable microorganism  B.cepacia  from re-growth using the modified challenge test at day 21.